I fish with simple rigs, I don't want to fiddle about with Rig Rings or tiny pieces of silicon when I'm fishing.
I extend the Shrink Tubing from my Line Aligner, so that the hair leaves the hook at the back of the Shank, directly opposite the point of the hook..
If the hair leaves at the bend of the hook and is ejected, then the hook can swing round and leave the Carp's mouth without getting a hold. Therefore down the back of the shank, whichever way the hook goes in the hook stands a good chance of pricking the fish in the lip.
Diagram enclosed, both rigs are made with Super Mantis on Carp-R-us Centurions Size6 (I think) and are 15cm long. You can see where I've stripped the outer coating to.